docs: move Fumadocs into docs/ and remove old Sphinx files

- Move all Fumadocs files (app/, components/, content/, lib/, scripts/,
  config files) into docs/ subdirectory
- Remove old Sphinx RST files, conf.py, Makefile, requirements.txt
- Remove .readthedocs.yaml
- Update GitHub source links to reflect new paths

Author: pcriadoperez

.gitignore

@@ -12,7 +12,7 @@ venv*/
 .vscode
 .binance/
 
-# node / next.js / fumadocs
+# node / next.js / fumadocs (inside docs/)
 node_modules/
 .next/
 out/
@@ -24,4 +24,4 @@ out/
 *.tsbuildinfo
 next-env.d.ts
 .vercel
-api-output/
+docs/api-output/

.readthedocs.yaml

@@ -50,7 +50,7 @@ export default async function Page(props: {
         <LLMCopyButton markdownUrl={markdownUrl} />
         <ViewOptions
           markdownUrl={markdownUrl}
-          githubUrl={`https://github.com/sammchardy/python-binance/blob/docs/content/docs/${page.slugs.join("/")}.mdx`}
+          githubUrl={`https://github.com/sammchardy/python-binance/blob/docs/docs/content/docs/${page.slugs.join("/")}.mdx`}
         />
       </div>
       <DocsBody>