fix(core): Export missing SeverityLevel from types

[lucas-zimerman]

This PR adds the missing export SeverityLevel from @sentry/types.

[github-actions]

Android (new) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	395.80 ms	455.46 ms	59.65 ms
Size	7.15 MiB	8.35 MiB	1.20 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
76d1baf+dirty	339.02 ms	408.65 ms	69.63 ms
86d6d2c+dirty	267.21 ms	325.24 ms	58.04 ms
f06c879+dirty	361.27 ms	407.88 ms	46.61 ms
8900e1a+dirty	371.40 ms	377.70 ms	6.31 ms
e540498+dirty	408.56 ms	480.00 ms	71.44 ms
62a750b+dirty	370.78 ms	376.73 ms	5.96 ms
2ec71da+dirty	375.64 ms	431.59 ms	55.95 ms
c639edf+dirty	363.39 ms	414.78 ms	51.39 ms
acadc0f+dirty	259.04 ms	304.67 ms	45.63 ms
27ef4ee+dirty	296.71 ms	351.00 ms	54.29 ms

App size

Revision	Plain	With Sentry	Diff
76d1baf+dirty	7.15 MiB	8.09 MiB	964.41 KiB
86d6d2c+dirty	7.15 MiB	8.09 MiB	962.69 KiB
f06c879+dirty	7.15 MiB	8.12 MiB	997.78 KiB
8900e1a+dirty	7.15 MiB	8.03 MiB	901.79 KiB
e540498+dirty	7.15 MiB	8.38 MiB	1.23 MiB
62a750b+dirty	7.15 MiB	8.21 MiB	1.06 MiB
2ec71da+dirty	7.15 MiB	8.38 MiB	1.23 MiB
c639edf+dirty	7.15 MiB	8.35 MiB	1.20 MiB
acadc0f+dirty	7.15 MiB	8.03 MiB	903.20 KiB
27ef4ee+dirty	7.15 MiB	8.08 MiB	959.49 KiB

[github-actions]

iOS (legacy) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1226.06 ms	1223.57 ms	-2.49 ms
Size	2.36 MiB	3.10 MiB	752.62 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
0d3e677+dirty	1214.39 ms	1225.70 ms	11.31 ms
d361d38+dirty	1246.04 ms	1267.12 ms	21.08 ms
9433f35+dirty	1246.94 ms	1271.45 ms	24.52 ms
700cbf4+dirty	1234.59 ms	1227.71 ms	-6.88 ms
70caa60+dirty	1218.27 ms	1230.30 ms	12.03 ms
abb7058+dirty	1255.42 ms	1268.86 ms	13.44 ms
9cab16b+dirty	1237.76 ms	1234.00 ms	-3.76 ms
6e8584e+dirty	1274.50 ms	1296.82 ms	22.32 ms
148f924+dirty	1214.76 ms	1215.73 ms	0.97 ms
a5d86e1+dirty	1242.47 ms	1239.94 ms	-2.53 ms

App size

Revision	Plain	With Sentry	Diff
0d3e677+dirty	2.36 MiB	3.10 MiB	753.12 KiB
d361d38+dirty	2.36 MiB	2.85 MiB	499.84 KiB
9433f35+dirty	2.36 MiB	2.85 MiB	499.80 KiB
700cbf4+dirty	2.36 MiB	3.08 MiB	734.22 KiB
70caa60+dirty	2.36 MiB	2.83 MiB	479.27 KiB
abb7058+dirty	2.36 MiB	2.87 MiB	520.42 KiB
9cab16b+dirty	2.36 MiB	3.08 MiB	737.23 KiB
6e8584e+dirty	2.36 MiB	2.88 MiB	533.17 KiB
148f924+dirty	2.36 MiB	3.04 MiB	696.25 KiB
a5d86e1+dirty	2.36 MiB	3.10 MiB	752.65 KiB

[github-actions]

iOS (new) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1215.70 ms	1224.21 ms	8.51 ms
Size	2.92 MiB	3.66 MiB	757.08 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
0d3e677+dirty	1239.02 ms	1241.22 ms	2.20 ms
d361d38+dirty	1272.96 ms	1291.70 ms	18.74 ms
9433f35+dirty	1232.24 ms	1232.74 ms	0.50 ms
700cbf4+dirty	1233.96 ms	1228.27 ms	-5.69 ms
70caa60+dirty	1279.08 ms	1281.54 ms	2.46 ms
abb7058+dirty	1260.28 ms	1266.56 ms	6.28 ms
9cab16b+dirty	1236.10 ms	1247.16 ms	11.06 ms
6e8584e+dirty	1271.71 ms	1281.26 ms	9.55 ms
148f924+dirty	1220.72 ms	1221.30 ms	0.58 ms
a5d86e1+dirty	1230.35 ms	1222.47 ms	-7.88 ms

App size

Revision	Plain	With Sentry	Diff
0d3e677+dirty	2.92 MiB	3.66 MiB	758.42 KiB
d361d38+dirty	2.92 MiB	3.41 MiB	503.57 KiB
9433f35+dirty	2.92 MiB	3.41 MiB	503.55 KiB
700cbf4+dirty	2.92 MiB	3.64 MiB	740.57 KiB
70caa60+dirty	2.92 MiB	3.39 MiB	486.04 KiB
abb7058+dirty	2.92 MiB	3.43 MiB	524.53 KiB
9cab16b+dirty	2.92 MiB	3.64 MiB	743.06 KiB
6e8584e+dirty	2.92 MiB	3.44 MiB	536.52 KiB
148f924+dirty	2.92 MiB	3.60 MiB	701.88 KiB
a5d86e1+dirty	2.92 MiB	3.66 MiB	757.10 KiB

[krystofwoldrich]

LGTM 🚀