Add cells for formulae and JSON

packages/frontend-core/src/components/sheet/cells/FormulaCell.svelte

@@ -0,0 +1,5 @@
+<script>
+  import TextCell from "./TextCell.svelte"
+</script>
+
+<TextCell {...$$props} readonly />

packages/frontend-core/src/components/sheet/cells/JSONCell.svelte

@@ -0,0 +1,36 @@
+<script>
+  import LongFormCell from "./LongFormCell.svelte"
+
+  export let onChange
+  export let value
+  export let api
+
+  $: stringified = getStringifiedValue(value)
+
+  const getStringifiedValue = value => {
+    if (!value) {
+      return value
+    }
+    try {
+      return JSON.stringify(value, null, 2)
+    } catch (error) {
+      return null
+    }
+  }
+
+  const parse = value => {
+    const trimmed = value?.trim()
+    if (!trimmed) {
+      onChange(null)
+      return
+    }
+    try {
+      const parsed = JSON.parse(trimmed)
+      onChange(parsed)
+    } catch (error) {
+      console.log("error parsing")
+    }
+  }
+</script>
+
+<LongFormCell {...$$props} bind:api value={stringified} onChange={parse} />

packages/frontend-core/src/components/sheet/cells/NumberCell.svelte

@@ -4,4 +4,4 @@
   export let api
 </script>
 
-<TextCell bind:api {...$$props} type="number" />
+<TextCell {...$$props} bind:api type="number" />

packages/frontend-core/src/components/sheet/renderers.js

@@ -7,6 +7,8 @@ import TextCell from "./cells/TextCell.svelte"
 import BlankCell from "./cells/BlankCell.svelte"
 import LongFormCell from "./cells/LongFormCell.svelte"
 import BooleanCell from "./cells/BooleanCell.svelte"
+import FormulaCell from "./cells/FormulaCell.svelte"
+import JSONCell from "./cells/JSONCell.svelte"
 
 const TypeComponentMap = {
   text: TextCell,
@@ -19,8 +21,8 @@ const TypeComponentMap = {
   boolean: BooleanCell,
   attachment: BlankCell,
   link: RelationshipCell,
-  formula: BlankCell,
+  formula: FormulaCell,
-  json: BlankCell,
+  json: JSONCell,
 }
 export const getCellRenderer = column => {
   return TypeComponentMap[column?.schema?.type] || TextCell