Syntax support for different SAP source files

This repo is entirely WIP but hdbdd, hdbsequence, hdbview are partially implemented.

Extensive Roadmap:

SAP HANA design-time objects

• [WIP] .hdbdd (XS classic)
• [WIP] .hdbsequence
• [WIP] .hdbview
• .hdbcds (XS Advanced)
• .hdbprocedure
• .hdbti
• .hprrole
• .hdbtable

SAP HANA XS Services

• .xsjob
• .xsaccess
• .xshttpdest
• .xsjslib
• .xsjs

SAP HANA Rule Framework

• .hprrule
• .hprvocabulary

Intensive Roadmap:

• SQL-inclusions
• Tree-sitter support