Create p0044-decision.md (#47)

* Create p0044-decision.md

Document the approval and rationale for the "Carbon: Proposal Tracking" proposal.

* Fix typo

Co-authored-by: Jon Meow <46229924+jonmeow@users.noreply.github.com>

* Format using Prettier

* Punctuation/typo fixes

Co-authored-by: Jon Meow <46229924+jonmeow@users.noreply.github.com>

proposals/p0044-decision.md

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+# Decision for: Carbon: Proposal Tracking
+
+<!--
+Part of the Carbon Language project, under the Apache License v2.0 with LLVM
+Exceptions. See /LICENSE for license information.
+SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+-->
+
+Proposal accepted on 2020-06-02
+
+Affirming:
+
+- [Chandler Carruth](https://github.com/chandlerc)
+- [Dmitri Gribenko](https://github.com/gribozavr)
+- [Geoff Romer](https://github.com/geoffromer)
+- [Josh Levenberg](https://github.com/josh11b)
+- [Matt Austern](https://github.com/austern)
+- [Richard Smith](https://github.com/zygoloid)
+
+Abstaining:
+
+- [Chris Palmer](https://github.com/noncombatant)
+- [Titus Winters](https://github.com/tituswinters)
+
+## Open questions
+
+### Do we use a Google Docs-centric or GitHub Markdown-centric flow?
+
+**Decision:** Use GitHub Markdown-centric flow.
+
+### Where should proposals be stored in GitHub?
+
+**Decision:** Store proposals in the repository they affect.
+
+### Should we push comments to focus on GitHub?
+
+**Decision:** Push high-level comments to GitHub, rather than focusing these
+discussions in Discourse.
+
+### Should there be a tracking issue?
+
+**Decision:** Don't require tracking issues.
+
+### Should declined/deferred proposals be committed?
+
+**Decision:** Do not commit declined/deferred proposals.
+
+## Rationale
+
+During the decision process, several of the individual rationales were
+influenced by the idea that one could view the proposal process in one of two
+ways:
+
+1.  A PR-centric model. The review team is trying to achieve consensus around a
+    PR as a whole. The PR may (and often will) implement the proposed changes.
+    The proposal as essentially a description of the changes.
+
+2.  A proposal-centric model. The review team is trying to achieve consensus
+    around a proposal. The PR may show a preview of the implementation, but it
+    is purely informative.
+
+If one favors a PR-centric model, this steers one away from committing proposals
+that are not accepted, towards committing proposals to the affected repository,
+etc. In general, the PR-centric model was favored.
+
+### Rationale for using a GitHub markdown-centric flow
+
+- The GitHub markdown-centric flow makes the on-ramp as smooth as possible for
+  external contributors.
+  - This positions the project to maximize the ease of engaging with and gaining
+    contributions from the wider industry.
+- The final documents must be in markdown form, so it is best if contributors
+  have the option to stay in markdown for the whole process. This is
+  significantly less complex than something that converts between formats:
+
+  - Less to learn
+  - Fewer steps in the process
+  - No outdated versions in the old format left behind
+
+- The technical flow seems on balance better than the Google Docs-based
+  workflow. The proposal does a really good job explaining pros and cons. In
+  summary, the Google Docs-centric workflow has a lot of cons that make it
+  difficult to work with proposals over the long term.
+
+### Rationale for not requiring tracking issues
+
+There were several members who had no strong preference on this issue. The
+concensus was that until there is a compelling reason to require tracking
+issues, the process is more light-weight without them.
+
+### Rationale for not committing proposals that are declined or deferred
+
+- This approach seems simpler.
+- When a proposal PR includes the changes put forth in the proposal (PR-centric
+  model), the declined PR might need to be considerably changed--and might lose
+  context--in order to be committed.
+- The community will put a lot of work into developing, discussing, and making a
+  decision on a proposal. There may be valuable insight in rejected proposals,
+  so it makes sense to archive them. However, as noted, committing the PR will
+  not always be possible with reasonable effort if not working in a
+  proposal-centric model, as the proposal text may not stand on its own.
+- While we may discover issues with this approach, it is better to try this way,
+  see if any issues can be rectified, and propose changes as necessary.
+
+### Rationale for committing a proposal to the repository it affects
+
+- This keeps the proposal close to the repository, and therefore, the community,
+  that it affects.
+- It facilitates autonomy of (future) review teams responsible for a particular
+  aspect of Carbon. For example, a reference implementation team responsible for
+  the carbon-toolchain repository.
+- It simplifies the common case and makes it easier to find how each repository
+  evolves over time.
+
+### Rationale for pushing high-level comments to GitHub
+
+While opinions were not as strong, reasons given for perferring comments in
+GitHub:
+
+- This flow will maximize the alignment with “normal” GitHub development flow.
+  - This both improves pulling external/new people into the flow, and will
+    reduce the number of flows they need to learn/remember/tool for.
+- We will get ecosystem benefits as this flow continues to be optimized by
+  GitHub and those using it.