Fold in MD in write-ups into docs

[wenrizc]

This pull request resolves issue #1389 by integrating the content from the /writeups directory into /docs directory.

move the markdown files under hamilton/tree/main/writeups to hamilton/tree/main/docs

Changes

Content Migration: The informational content from various Markdown files within the /writeups directory has been moved to the /docs directory.
developer_setup.md -> docs/community
data_quality.md -> docs/concepts
decorators.md-> docs/concepts
/garbage_collection-> docs/concepts
basics.md-> docs/get-started
Directory Removal: The /writeups directory and its contents have been deleted, as they are now redundant.

[skrawcz]

I think this is already in https://hamilton.apache.org/concepts/function-modifiers/ no? so could just be deleted? please check.

[wenrizc]

Compared to decorators.md, function-modifiers.rst is missing @does, @parameterize_frame, @model. Should I integrate them into function-modifiers.rst?Also, the introduction for @subdag can be added to function-modifiers-advanced.rst.

[zilto]

@does, @parameterize_frame, @model are deprecated AFAIK. There's mention about it in the source code where these decorators are defined. It might preferable to not include them in the latest docs if deprecated

[wenrizc]

ok

[skrawcz]

is this required with https://hamilton.staged.apache.org/get-started/your-first-dataflow/ ? what is missing?

[wenrizc]

I rechecked basics.md, and it can be deleted.

[skrawcz]

Docs build fails with :

/home/runner/work/hamilton/hamilton/docs/community/developer_setup.md:74: WARNING: 'myst' cross-reference target not found: 'how-to-run-unit-tests' [myst.xref_missing]
/home/runner/work/hamilton/hamilton/docs/concepts/decorators.md:3: WARNING: 'myst' cross-reference target not found: 'hamilton/function_modifiers.py' [myst.xref_missing]
/home/runner/work/hamilton/hamilton/docs/concepts/decorators.md:422: WARNING: 'myst' cross-reference target not found: 'examples/reusing_functions/reusable_subdags.py' [myst.xref_missing]
/home/runner/work/hamilton/hamilton/docs/concepts/garbage_collection/post.md:13: WARNING: 'myst' cross-reference target not found: 'www.tryhamilton.dev' [myst.xref_missing]
/home/runner/work/hamilton/hamilton/docs/get-started/basics.md:90: WARNING: 'myst' cross-reference target not found: '/hamilton/driver.py' [myst.xref_missing]

You can build them locally with https://github.com/apache/hamilton/blob/14143a504166fc10e9eac269fc377536ab36c2e5/docs/README.md