* integrate diskann to the sqlite code
* cleanup code a bit and add more comments
* make parsing code resilient to spaces inside FLOAT typename
* fixup
* fix bugs related to deletes in diskann
* small cleanup
* rename macro
* slightly cleanup vtab code
* slightly improve vectorIndex code
* make code less hacky
* add strange test
* build bundles
* return unit test for diskann pieces
* add one more test
* don't run search on first insertion
* review fixes
* disable index creation in non-normal parse modes
* build bundles
* diskann vector binary format
* remove changes from another branch
* build bundles
* fix bundle
* add const to the signatures
* build bundles
* slightly change interface for BlobSpot
* build bundles
* add isInitialized flag to the BlobSpot
* fix comment
* fix method name in the header file
* review fixes
* build bundles
* add basic functions for working with f32/f64 vectors
* add header file
* fix comment style
* add generic code for working with vectors
* register vector functions
* fix edge cases in vector extract impl
* add static flag for vector (will be used later)
* add basic TCL-based tests
* guard vector functions with SQLITE_OMIT_VECTOR
* adjust build scripts
* delete libsql_vector_idx from this branch
* add one more test
* update bundles
* fix asserts
* fix constants (#define-s are universal but const int doesn't recognized by all compilers)
* update bundles
* review fixes
* build bundles
* add comment about linking math library
