Python: adds JSON.STRLEN, JSON.STRAPPEND commands (#2372)

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Signed-off-by: Shoham Elias <shohame@amazon.com>
Signed-off-by: Shoham Elias <116083498+shohamazon@users.noreply.github.com>
Co-authored-by: Andrew Carbonetto <andrew.carbonetto@improving.com>
Co-authored-by: jonathanl-bq <72158117+jonathanl-bq@users.noreply.github.com>

CHANGELOG.md

@@ -32,6 +32,7 @@
 * Node: Added `JSON.TYPE` ([#2510](https://github.com/valkey-io/valkey-glide/pull/2510))
 * Java: Added `JSON.RESP` ([#2513](https://github.com/valkey-io/valkey-glide/pull/2513))
 * Node: Added `FT.DROPINDEX` ([#2516](https://github.com/valkey-io/valkey-glide/pull/2516))
+* Python: Add `JSON.STRAPPEND` , `JSON.STRLEN` commands ([#2372](https://github.com/valkey-io/valkey-glide/pull/2372))
 
 #### Breaking Changes