db: add templates

database/bindata.go

database/migrations/0004_add_template_table.up.sql

go.mod

go.sum

models/account_db.go

models/db_helpers.go

models/metadata_db.go

models/template.go

models/template_db.go

models/template_db_test.go

restapi/embedded_spec.go

restapi/operations/logging.go

restapi/operations/prometheus.go

restapi/operations/rednerd_api.go

...operations/rendering/post_v1_template_userid_id_render.go

...rendering/post_v1_template_userid_id_render_parameters.go

...rendering/post_v1_template_userid_id_render_prometheus.go

.../rendering/post_v1_template_userid_id_render_responses.go

...rendering/post_v1_template_userid_id_render_urlbuilder.go

restapi/operations/rendering/render_one.go