[ADDED] ObjectStore support

[kozlovic]

Objects:

• natsHeader
• objStoreConfig
• objStore
• objStoreMeta
• objStoreMetaOptions
• objStoreInfo
• objStoreLink
• objStoreOptions
• objStorePut
• objStoreGet
• objStoreInfoList
• objStoreNamesList
• objStoreStatus
• objStoreStatusList
• objStoreWatcher
• objStoreWatchOptions

Global Management APIs:

• objStoreConfig_Init
• js_CreateObjectStore
• js_UpdateObjectStore
• js_ObjectStore
• js_ObjectStoreNames
• objStoreNamesList_Destroy
• js_ObjectStoreStatuses
• objStoreStatusesList_Destroy
• js_DeleteObjectStore

Per-store Management APIs:

• objStoreOptions_Init
• objStore_GetInfo
• objStoreMeta_Init
• natsHeader_New
• natsHeader_Set
• natsHeader_Add
• natsHeader_Get
• natsHeader_Keys
• natsHeader_KeysCount
• natsHeader_Values
• natsHeader_Delete
• natsHeader_Destroy
• objStore_Put
• objStorePut_Add
• objStorePut_Complete
• objStorePut_Destroy
• objStore_PutString
• objStore_PutBytes
• objStore_PutFile
• objStoreInfo_Destroy
• objStore_Get
• objStoreGet_Info
• objStoreGet_Read
• objStoreGet_ReadAll
• objStoreGet_Destroy
• objStore_GetString
• objStore_GetBytes
• objStore_GetFile
• objStore_UpdateMeta
• objStore_Delete
• objStore_Seal
• objStore_Status
• objStoreStatus_Destroy
• objStore_AddLink
• objStore_AddBucketLink
• objStoreWatchOptions_Init
• objStore_Watch
• objStoreWatcher_Next
• objStoreWatcher_Stop
• objStoreWatcher_Destroy
• objStore_List
• objStoreList_Destroy
• objStore_Destroy

Resolves #876

[codecov]

Codecov Report

❌ Patch coverage is 71.17008% with 478 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.22%. Comparing base (58fd1db) to head (0baece3).
⚠️ Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
src/object.c	71.41%	130 Missing and 261 partials ⚠️
src/nats.c	71.05%	9 Missing and 24 partials ⚠️
src/util.c	68.35%	9 Missing and 16 partials ⚠️
src/glib/glib_ssl.c	53.33%	7 Missing and 7 partials ⚠️
src/jsm.c	74.46%	8 Missing and 4 partials ⚠️
src/kv.c	0.00%	0 Missing and 2 partials ⚠️
src/js.c	91.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #902      +/-   ##
==========================================
+ Coverage   70.14%   70.22%   +0.08%     
==========================================
  Files          47       48       +1     
  Lines       15593    17259    +1666     
  Branches     3212     3540     +328     
==========================================
+ Hits        10937    12120    +1183     
- Misses       1568     1736     +168     
- Partials     3088     3403     +315     

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