Implement ast-search index --persist and ast-search lookup --symbol <name> query against the DB

[Rakshat28]

No description provided.

[github-actions]

Benchmark Comparison

                        time:   [1.7169 ms 1.7194 ms 1.7223 ms]
                        change: [-3.2151% -2.8840% -2.5113%] (p = 0.00 < 0.05)
                        Performance has improved.
                        time:   [8.6263 ms 8.6482 ms 8.6856 ms]
                        change: [-3.3201% -3.0332% -2.5825%] (p = 0.00 < 0.05)
                        Performance has improved.
                        time:   [141.19 µs 141.50 µs 141.92 µs]
                 change:
                        time:   [-0.4063% +0.3271% +1.0768%] (p = 0.40 > 0.05)
                        No change in performance detected.
                        time:   [1.2831 ms 1.2839 ms 1.2850 ms]
                 change:
                        time:   [-0.2068% +0.2935% +1.1780%] (p = 0.55 > 0.05)
                        No change in performance detected.
                        time:   [6.3965 ms 6.3998 ms 6.4038 ms]
                 change:
                        time:   [+0.4100% +0.4924% +0.5775%] (p = 0.00 < 0.05)
                        time:   [12.794 ms 12.805 ms 12.820 ms]
                 change:
                        time:   [+0.4988% +0.6082% +0.7485%] (p = 0.00 < 0.05)
                        time:   [4.1727 ms 4.1747 ms 4.1769 ms]
                        change: [-0.5502% -0.4772% -0.4111%] (p = 0.00 < 0.05)
                        time:   [4.2014 ms 4.2039 ms 4.2065 ms]
                        change: [+0.3137% +0.4226% +0.5345%] (p = 0.00 < 0.05)
                        time:   [440.10 µs 440.38 µs 440.80 µs]
                        change: [-0.6618% -0.3524% -0.0809%] (p = 0.00 < 0.05)
                        time:   [2.0609 ms 2.0622 ms 2.0639 ms]
                        change: [+1.0878% +1.1665% +1.2556%] (p = 0.00 < 0.05)
                        Performance has regressed.
                        time:   [11.702 ms 11.711 ms 11.719 ms]
                        change: [-1.5195% -1.3217% -1.1289%] (p = 0.00 < 0.05)
                        Performance has improved.
                        time:   [13.115 ms 13.126 ms 13.139 ms]
                        change: [-5.8560% -5.7388% -5.6083%] (p = 0.00 < 0.05)
                        Performance has improved.